FreeBSD/Linux Kernel Cross Reference
sys/netinet/ip_icmp.h
1 /*-
2 * Copyright (c) 1982, 1986, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * @(#)ip_icmp.h 8.1 (Berkeley) 6/10/93
30 * $FreeBSD: src/sys/netinet/ip_icmp.h,v 1.27 2008/11/19 09:39:34 zec Exp $
31 */
32
33 #ifndef _NETINET_IP_ICMP_H_
34 #define _NETINET_IP_ICMP_H_
35
36 /*
37 * Interface Control Message Protocol Definitions.
38 * Per RFC 792, September 1981.
39 */
40
41 /*
42 * Internal of an ICMP Router Advertisement
43 */
44 struct icmp_ra_addr {
45 u_int32_t ira_addr;
46 u_int32_t ira_preference;
47 };
48
49 /*
50 * Structure of an icmp header.
51 */
52 struct icmphdr {
53 u_char icmp_type; /* type of message, see below */
54 u_char icmp_code; /* type sub code */
55 u_short icmp_cksum; /* ones complement cksum of struct */
56 };
57
58 /*
59 * Structure of an icmp packet.
60 *
61 * XXX: should start with a struct icmphdr.
62 */
63 struct icmp {
64 u_char icmp_type; /* type of message, see below */
65 u_char icmp_code; /* type sub code */
66 u_short icmp_cksum; /* ones complement cksum of struct */
67 union {
68 u_char ih_pptr; /* ICMP_PARAMPROB */
69 struct in_addr ih_gwaddr; /* ICMP_REDIRECT */
70 struct ih_idseq {
71 n_short icd_id;
72 n_short icd_seq;
73 } ih_idseq;
74 int ih_void;
75
76 /* ICMP_UNREACH_NEEDFRAG -- Path MTU Discovery (RFC1191) */
77 struct ih_pmtu {
78 n_short ipm_void;
79 n_short ipm_nextmtu;
80 } ih_pmtu;
81
82 struct ih_rtradv {
83 u_char irt_num_addrs;
84 u_char irt_wpa;
85 u_int16_t irt_lifetime;
86 } ih_rtradv;
87 } icmp_hun;
88 #define icmp_pptr icmp_hun.ih_pptr
89 #define icmp_gwaddr icmp_hun.ih_gwaddr
90 #define icmp_id icmp_hun.ih_idseq.icd_id
91 #define icmp_seq icmp_hun.ih_idseq.icd_seq
92 #define icmp_void icmp_hun.ih_void
93 #define icmp_pmvoid icmp_hun.ih_pmtu.ipm_void
94 #define icmp_nextmtu icmp_hun.ih_pmtu.ipm_nextmtu
95 #define icmp_num_addrs icmp_hun.ih_rtradv.irt_num_addrs
96 #define icmp_wpa icmp_hun.ih_rtradv.irt_wpa
97 #define icmp_lifetime icmp_hun.ih_rtradv.irt_lifetime
98 union {
99 struct id_ts { /* ICMP Timestamp */
100 n_time its_otime; /* Originate */
101 n_time its_rtime; /* Receive */
102 n_time its_ttime; /* Transmit */
103 } id_ts;
104 struct id_ip {
105 struct ip idi_ip;
106 /* options and then 64 bits of data */
107 } id_ip;
108 struct icmp_ra_addr id_radv;
109 u_int32_t id_mask;
110 char id_data[1];
111 } icmp_dun;
112 #define icmp_otime icmp_dun.id_ts.its_otime
113 #define icmp_rtime icmp_dun.id_ts.its_rtime
114 #define icmp_ttime icmp_dun.id_ts.its_ttime
115 #define icmp_ip icmp_dun.id_ip.idi_ip
116 #define icmp_radv icmp_dun.id_radv
117 #define icmp_mask icmp_dun.id_mask
118 #define icmp_data icmp_dun.id_data
119 };
120
121 /*
122 * Lower bounds on packet lengths for various types.
123 * For the error advice packets must first insure that the
124 * packet is large enough to contain the returned ip header.
125 * Only then can we do the check to see if 64 bits of packet
126 * data have been returned, since we need to check the returned
127 * ip header length.
128 */
129 #define ICMP_MINLEN 8 /* abs minimum */
130 #define ICMP_TSLEN (8 + 3 * sizeof (n_time)) /* timestamp */
131 #define ICMP_MASKLEN 12 /* address mask */
132 #define ICMP_ADVLENMIN (8 + sizeof (struct ip) + 8) /* min */
133 #define ICMP_ADVLEN(p) (8 + ((p)->icmp_ip.ip_hl << 2) + 8)
134 /* N.B.: must separately check that ip_hl >= 5 */
135
136 /*
137 * Definition of type and code field values.
138 */
139 #define ICMP_ECHOREPLY 0 /* echo reply */
140 #define ICMP_UNREACH 3 /* dest unreachable, codes: */
141 #define ICMP_UNREACH_NET 0 /* bad net */
142 #define ICMP_UNREACH_HOST 1 /* bad host */
143 #define ICMP_UNREACH_PROTOCOL 2 /* bad protocol */
144 #define ICMP_UNREACH_PORT 3 /* bad port */
145 #define ICMP_UNREACH_NEEDFRAG 4 /* IP_DF caused drop */
146 #define ICMP_UNREACH_SRCFAIL 5 /* src route failed */
147 #define ICMP_UNREACH_NET_UNKNOWN 6 /* unknown net */
148 #define ICMP_UNREACH_HOST_UNKNOWN 7 /* unknown host */
149 #define ICMP_UNREACH_ISOLATED 8 /* src host isolated */
150 #define ICMP_UNREACH_NET_PROHIB 9 /* prohibited access */
151 #define ICMP_UNREACH_HOST_PROHIB 10 /* ditto */
152 #define ICMP_UNREACH_TOSNET 11 /* bad tos for net */
153 #define ICMP_UNREACH_TOSHOST 12 /* bad tos for host */
154 #define ICMP_UNREACH_FILTER_PROHIB 13 /* admin prohib */
155 #define ICMP_UNREACH_HOST_PRECEDENCE 14 /* host prec vio. */
156 #define ICMP_UNREACH_PRECEDENCE_CUTOFF 15 /* prec cutoff */
157 #define ICMP_SOURCEQUENCH 4 /* packet lost, slow down */
158 #define ICMP_REDIRECT 5 /* shorter route, codes: */
159 #define ICMP_REDIRECT_NET 0 /* for network */
160 #define ICMP_REDIRECT_HOST 1 /* for host */
161 #define ICMP_REDIRECT_TOSNET 2 /* for tos and net */
162 #define ICMP_REDIRECT_TOSHOST 3 /* for tos and host */
163 #define ICMP_ALTHOSTADDR 6 /* alternate host address */
164 #define ICMP_ECHO 8 /* echo service */
165 #define ICMP_ROUTERADVERT 9 /* router advertisement */
166 #define ICMP_ROUTERADVERT_NORMAL 0 /* normal advertisement */
167 #define ICMP_ROUTERADVERT_NOROUTE_COMMON 16 /* selective routing */
168 #define ICMP_ROUTERSOLICIT 10 /* router solicitation */
169 #define ICMP_TIMXCEED 11 /* time exceeded, code: */
170 #define ICMP_TIMXCEED_INTRANS 0 /* ttl==0 in transit */
171 #define ICMP_TIMXCEED_REASS 1 /* ttl==0 in reass */
172 #define ICMP_PARAMPROB 12 /* ip header bad */
173 #define ICMP_PARAMPROB_ERRATPTR 0 /* error at param ptr */
174 #define ICMP_PARAMPROB_OPTABSENT 1 /* req. opt. absent */
175 #define ICMP_PARAMPROB_LENGTH 2 /* bad length */
176 #define ICMP_TSTAMP 13 /* timestamp request */
177 #define ICMP_TSTAMPREPLY 14 /* timestamp reply */
178 #define ICMP_IREQ 15 /* information request */
179 #define ICMP_IREQREPLY 16 /* information reply */
180 #define ICMP_MASKREQ 17 /* address mask request */
181 #define ICMP_MASKREPLY 18 /* address mask reply */
182 #define ICMP_TRACEROUTE 30 /* traceroute */
183 #define ICMP_DATACONVERR 31 /* data conversion error */
184 #define ICMP_MOBILE_REDIRECT 32 /* mobile host redirect */
185 #define ICMP_IPV6_WHEREAREYOU 33 /* IPv6 where-are-you */
186 #define ICMP_IPV6_IAMHERE 34 /* IPv6 i-am-here */
187 #define ICMP_MOBILE_REGREQUEST 35 /* mobile registration req */
188 #define ICMP_MOBILE_REGREPLY 36 /* mobile registration reply */
189 #define ICMP_SKIP 39 /* SKIP */
190 #define ICMP_PHOTURIS 40 /* Photuris */
191 #define ICMP_PHOTURIS_UNKNOWN_INDEX 1 /* unknown sec index */
192 #define ICMP_PHOTURIS_AUTH_FAILED 2 /* auth failed */
193 #define ICMP_PHOTURIS_DECRYPT_FAILED 3 /* decrypt failed */
194
195 #define ICMP_MAXTYPE 40
196
197 #define ICMP_INFOTYPE(type) \
198 ((type) == ICMP_ECHOREPLY || (type) == ICMP_ECHO || \
199 (type) == ICMP_ROUTERADVERT || (type) == ICMP_ROUTERSOLICIT || \
200 (type) == ICMP_TSTAMP || (type) == ICMP_TSTAMPREPLY || \
201 (type) == ICMP_IREQ || (type) == ICMP_IREQREPLY || \
202 (type) == ICMP_MASKREQ || (type) == ICMP_MASKREPLY)
203
204 #ifdef _KERNEL
205 void icmp_error(struct mbuf *, int, int, n_long, int);
206 void icmp_input(struct mbuf *, int);
207 void icmp_init(void);
208 int ip_next_mtu(int, int);
209 #endif
210
211 #endif
212
|